Partial abstract: "This report reviews the scope of a research effort initiated in 1974 at the U.S. Army Engineer Waterways Experiment Station with the objectives of (a) assessing the state of the art in geophysical cavity detection and delineation methodology and (b) developing new methods and improving or adapting old methods for application to cavity detection and delineation." This report discusses the geography, topography, site drilling tests, magnetic and microgravimetric surveys, and other information about the Medfor Cave site in Florida.

Preface: This report presents the results of condition surveys of taxiway 5 and the east N-S runway, McCoy Air Force Base, Orlando, Florida, made in accordance with addendum 3 to Instructions and Outline, "Condition Surveys for Existing Pavements."

Abstract: Kissimmee River structures S-65E, S-65D, and S-65B were reproduced in a 1:20 scale model in order to study ways of eliminating scour of the downstream riprap blankets by means of structural modifications of operating procedures.

Abstract: "Fish, waterfowl and wading birds, and aquatic mammal populations on Lake Conway were surveyed for 1 year after the introduction of the herbivorous fish, white amur (Ctenopharyngodon idella). Low water levels reduced littoral zone area, which lead to stunted panfish and poorer condition of largemouth bass. Vegetated samples supported more diverse fish populations than beach sites. White amur and migratory waterfowl consumed the same plant foods; continued reduction of submerged plants by white amur may adversely affect overwintering waterfowl populations. Aquatic mammals were influenced by removal of vegetation due to shoreline development."

Report describing a study of the entrance channel to St. Andrew Bay, near Panama City, Florida, which is subject to the formation of large sand waves. It was intended to determine the extent of the problem and to review possible alternatives for addressing it.